Britney Spears has plenty of fans who've been around since the release of "... Baby One More Time" in 1998, but few can say that they were truly there from the beginning, like little sister Jamie Lynn can.

Earlier this week, Britney performed her final Piece of Me concert before her return to Las Vegas next year, at the Formula 1 Grand Prix in Austin, Texas.

Her younger sister, Jamie Lynn Spears, attended the show with her baby daughter Ivey Joan, posting a video of her bopping along to "Work Bitch":

While watching the show, Jamie Lynn posted a photo of herself looking up at the stage, captioning it:

"Looked up to her since the day I was born. Couple more people look up to her now also. But I was the first."

She also posted pics of herself enjoying time with her eldest daughter, Maddie, Britney's sons Preston and Jayden, and her husband Jamie. (For those playing at home, there's Jamie Lynn Spears, her hubby Jamie Watson, and also Jamie Spears, who's Britney and and Jamie Lynn's dad. It's a lot of Jamies!)